21263120

素因数分解:

$2^4\times 5^1\times {\mathrm{67}}^1\times {\mathrm{3967}}^1$

素因数の和:4047

約数の個数: 40

約数和(自身を含む): 50187264

約数和(自身を除く): 28924144

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 67, 80, 134, 268, 335, 536, 670, 1072, 1340, 2680, 3967, 5360, 7934, 15868, 19835, 31736, 39670, 63472, 79340, 158680, 265789, 317360, 531578, 1063156, 1328945, 2126312, 2657890, 4252624, 5315780, 10631560, 21263120]

約数ペア:

[(1, 21263120), (2, 10631560), (4, 5315780), (5, 4252624), (8, 2657890), (10, 2126312), (16, 1328945), (20, 1063156), (40, 531578), (67, 317360), (80, 265789), (134, 158680), (268, 79340), (335, 63472), (536, 39670), (670, 31736), (1072, 19835), (1340, 15868), (2680, 7934), (3967, 5360)]